I want to improve the way I make .imp ebooks from (rich) .html and up to now my MO has been to perfect what I would like displayed on my hardware reader ebook-wise (pardon the pun) and then make other ebook formats for uploading here. Other formats include .prc/.mobi (Mobipocket) and .lrf/.epub (Sony).

I'm working on an "oeb2mobi" for Calibre which will allow the generation of Mobipocket books from OEB XHTML+CSS content. After that, I want to try to shore up differences among the outputs of Calibre's various target format conversions. The goal would be to allow book creators to use one standards-compliant HTML source and produce books which look "the same as possible" in all the various output formats. No IMP support yet, but perhaps one day...